The ability of a geosynthetic clay liner (GCL) manufactured using sodium-activated bentonite as a barrier for municipal solid waste incineration (MSWI) fly ash is examined. The GCL specimens were permeated with two different man-made MSWI fly ash leachates to test the hydraulic conductivity (k). The effects of type of permeant solution, prehydration with distilled water (DW), and effective stress (15 vs. 150 kPa) were assessed. Results indicated that the permeation of MSWI fly ash leachates produced a significantly negative effect on the hydraulic performance of the GCL and resulted in equilibrium k values ranging from 8.5 × 10^–10 to 7.45 × 10^–7 m/s, which were 17 and 14,900 times higher than the maximum value typically allowed for MSWI fly ash landfill base barriers (5.0 × 10^–11 m/s). Although prehydration with DW and increase in effective stress could somewhat minimize the negative impact of MSWI fly ash leachates on the hydraulic performance of GCL, the k values of GCL samples were not able to be reduced to the required value (≤ 5.0 × 10^–11 m/s). Thus, the GCL investigated in this study may not be a suitable barrier for the landfill of MSWI fly ash.

检查了使用钠活化膨润土作为城市固体废物焚烧 (MSWI) 飞灰的屏障制造的土工合成粘土衬垫 (GCL) 的能力。用两种不同的人造 MSWI 飞灰渗滤液渗透 GCL 样品以测试水力传导率 ( k )。评估了渗透剂溶液类型、蒸馏水预水合 (DW) 和有效应力（15 对 150 kPa）的影响。结果表明，MSWI 飞灰渗滤液的渗透对 GCL 的水力性能产生了显着的负面影响，导致平衡k值范围为 8.5 × 10 ^–10到 7.45 × 10 ^–7 m/s，比 MSWI 飞灰垃圾填埋场基础屏障（5.0 × 10 ^–11  m/s）通常允许的最大值高 17 倍和 14,900 倍。虽然用 DW 预水化和增加有效应力可以在一定程度上最大限度地减少垃圾焚烧飞灰渗滤液对 GCL 水力性能的负面影响，但GCL 样品的k值无法降低到所需值（≤ 5.0 × 10 ^–11 小姐）。因此，本研究中调查的 GCL 可能不是 MSWI 飞灰填埋场的合适屏障。